Starting to have problems again with start/stopping/stuttering, especially when I first change a channel. Also when I skip commercial it lags for a long time to almost freezing.
I'm running latest update, which almost happens daily now. ATV at 13.4, fiber internet with Orbi mesh system. ATV getting 200+ Mbps down. Has been rock solid for a few months.
any ideas??

On Apple TV, first go to Settings.app and note down the IP address of your Apple TV. Then launch the Channels app and make sure it is visible on the screen. Finally, use a browser on another device like a computer or tablet to open http://x.x.x.x:57000/speedtest using the IP of your Apple TV.